ios - NSRegularExpression 评估不正确

Question

我有以下密码正则表达式，可以在 Password.123 的在线正则表达式测试器上正确计算:

/(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)(?!^[\\W]*$)(^[a-zA-Z0-9\\W]).{7,}/

当我在 swift 中创建 NSRegularExpression 时，它的计算不正确，无法找到 Password.123 的匹配项:

let password = "Password.123"

let regex = try! NSRegularExpression(pattern: "/(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)(?!^[\\W]*$)(^[a-zA-Z0-9\\W]).{7,}/", options: [])

let range = NSRange(location: 0, length: password.count)
print("Valid: \(regex.firstMatch(in: password, options: [], range: range) != nil)")

这打印出 false 但应该是 true。我哪里错了？

Answer 1

从字符串中删除 /。即

let regex = try! NSRegularExpression(pattern: "(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)(?!^[\\W]*$)(^[a-zA-Z0-‌​9\\W]).{7,}", options: [])